Boat-hull.



U. WiL-COX.

Patented Mar'. 12

2 SHEETS-SHEET 1.

Ul. WILCOX. BOAT HULL. APPLlcA'TloN man MAY 20. |916.

Patented' Mar., 12, 1918.

vISI-IEETS-SllE-ET 2.

Zul/6725011 l,

UnQuHAR'r w1LcoX,-or BUFFALO, NEW YORK. 1 Y

BOAT-HULL.

To @ZZ/whom t may concern A Beit known that I, UimnHARTV 1vVILoox', a citizen, of.'l the United States, residing at Buffalo, in the county of'Erie'and'Stateof New York, have, invented vnew and useful Improvements in Boat-.Hullaof which the following is a` specification.

Y This invention lrelates to a hull'which is more particularly designed for small or toy boats althoughsoine featuresY of the same may also be advantageously employed in boats ofh larger sizes. 4

The object `ofjthisinvention is to provide an improved construction of"boat"hullsV of.

lng and instructive pastime while completing the boat at home but also insuring turn-` in out a well formed and strong hull.

ln the accompanying drawings: j

Figure 1 is a side elevation of the boat hull embodying my invention with a portion of the shin broken away. Fig. Qis a vertical transverse section taken on line 2-2 of Fig. l. Fig. 3 is a vertical longitudinal section of the hull taken on line 3 3, Fig.'2. Fig. 4 is a top plan view of the boat hull with the deck or covering removed. ,Figs 5 and 6 are top and bottom plan views respectively of the keel which is constructed in accordance with my improvements.

Similar characters of reference indicate corresponding parts throughout the several views.

l represents the longitudinal keel or backbone of the boat hull which is preferably bow-shaped having its concave side facing upwardly and provided at its front with anv upwardly and forwardly extending stem post 2 and with an upwardly and rearwardly extending stern post 3. In somewhat larger boats, however, these posts may be constructed separately from the keel proper and bolted thereto and strengthened by stem or stern knees as is the more usual and customary practice. The upper portion of the keel Specieationof Letters Patent.

whichextendupwardlv from opposite sides Y i Patented .Man 12, 1918'. Application filed May 20, 19.16; Serial No. 98,813.

the lower horizontal fiat' surface 5vv whichV u) thus permits the lower part of each of said bulkheads "to be movedA vertically downwardly into one of saidnotches l1 so that when said bulkheadis in position and preferably glued in said vnotch,' it is secured to I l,

said keel and held against displacement thereon. The different bulkheads are also properlyA rspaced longitudinally along the keel 'and are all positionedparalleliV to each other and perpendicular to the keel, thereby eXpediting assemblingy ofj the parts and insuring the proper positioning of Vthe'same without regard to the particular skill' of the builder. The shape of leach ofthe bulkheads varies to correspond with the desired shape of the hull of the `boat andthe desired fullness of the hull lines may be obtained with mathematical exactitudebecause these bulkheads are machine made and thev hull form will be permanently retained because they are sawed to shape so that no deformation, such as occurs with ordinary bent ribs is possible.

Adjacent to the lower ends of the bulkheads, the keel 1 is provided on its lateral sides with longitudinal rabbets or furrows 8 which extend continuously from the upper part of the stein post EZ'to the upper part of the stern post 3. Starting with the garboard-strake, and then continuing with the bilge and sheer strakes forming the planking or skin 9 of the hull these strakes are laid one by one over the lateral curved edges of the bulkheads, and properly secured v thereto, the planks next to the keel being curve with the outer curved surface of the keel as best shown in Fig. 2. It will be noted that the horizontalwidth of the keel is somewhat greater at its middle portion this construction decreasing the total width of planking of the inidship sections and therebydecreasing thev objectionable taper of the individual planks inasmuch as this width of planking` is vcaused to be made nearly uniform at all the transverse sections. This truss v like keel construction also strengthens that portion ofthe same which is subjected to the maximum bending strain'.

Over the top edges of the bulkheads and the upper flat surfaces of the stem and lstein posts is laid a deck or covering 10 which may be slightly raised or arched in the inid- Ydle, as best shown in Fig. 2, so as to prevent the accumulation Y of. water onv top of said deck, this being accomplished by properly sawing the upper part of each of the bulk-- heads so that the central part of the top edge is higher than the ends.

l1 is a balancing fin or stabilizing center* n board which is secured at its upperY edge to the flat bottom face 12 ofV the keel by means through a' lug 18 on the rear end of the center board and entering the lower end of the rudder,'sa1d p ivot screw 18 and pin 15 being arranged axially in line.

The'boat hull is so simple in its actual @epica of this patent may be obtained for Vmanual construction as tok insure a well proportioned handsome craftV without the exercise of'undue patience and at a very reasonable outlay. No special tools or appal ratus are necessary in its building and the most :precisely scientific Yand symmetrical form of hull may be obtained by a youth with scant chance for bungling. Further'- nioreythe hull will stand severe abuse and is readilyrepaired if need be, and broken parts canV be readily replaced so as to form water displacing compartments which are not liable to leak. 1 Y r f I claim as my invention: c

A boat hullv comprising a keel having Va downwardly curved upper side provided at its forward end with a stem post, and a stern post formed atthe rear end of said keel, a transverse bulkhead secured onlyat;l its lower edge to said keelya skin orplanking secured to said keel and bulkhead, and a deck laid over said bulkhead 'and said stemy and stern posts and separated by an interveningV space from the keel Vbetween said stem and stern posts. Y f URQUHART WILCOX.

ve cents each,V by addressing the Commissioner of Patents Washingtim, D.. 0.? Y 

